Bar stool



FIG. 1 is a front, left side perspective view of a bar stool showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear perspective view thereof;

FIG. 4 is a right side perspective view thereof;

FIG. 5 is a left side perspective view thereof;

FIG. 6 is a top perspective view thereof;

FIG. 7 is an enlarged fragmentary rear perspective view showing the seat thereof;

FIG. 8 is an enlarged fragmentary rear perspective view showing the backrest thereof; and,

FIG. 9 is an enlarged fragmentary front perspective view showing the backrest thereof.

The broken lines illustrate portions of the bar stool that form no part of the claimed design. 

CLAIM The ornamental design for a bar stool, as shown and described. 